CN101533316A - Interactive electric whiteboard system and method for using same - Google Patents
Interactive electric whiteboard system and method for using same Download PDFInfo
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- CN101533316A CN101533316A CN200910021965A CN200910021965A CN101533316A CN 101533316 A CN101533316 A CN 101533316A CN 200910021965 A CN200910021965 A CN 200910021965A CN 200910021965 A CN200910021965 A CN 200910021965A CN 101533316 A CN101533316 A CN 101533316A
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Abstract
The invention discloses an interactive electric whiteboard system. The system consists of an image acquisition device, a projection device, a computer, a wireless receiving device with a USB interface, a whiteboard and an electric whiteboard pen, wherein the image acquisition device and the projection device are all connected with the computer; the computer is connected with the wireless receiving device with the USB interface which is used for receiving a wireless signal from the electric whiteboard pen, sending the wireless signal to the computer and controlling the operation of the computer; the electric whiteboard pen is provided with an infrared transmission device, the light transmitted from the infrared transmission device can form an infrared light spot on the whiteboard, and the infrared light spot is acquired by the image acquisition device and transmitted to the computer by an image acquisition card; the computer can work out the relative position of the electric whiteboard pen projected on the whiteboard; the relative position is utilized to generate an image, and simultaneously the projection device projects the image contents on the whiteboard; and the functions of a keyboard and a mouse can be realized by the electric whiteboard pen.
Description
Technical field:
The invention belongs to image processing field, relate to a kind of interactive electric whiteboard system and using method thereof.
Background technology:
Electronic whiteboard be active conference with occasion such as education common exchange presentation tool, can more intuitively and efficiently help to express viewpoint and thought.
Use the electronic whiteboard of pressure sensitivity input mode, be equivalent to a touch-screen of computing machine, serve as a teacher with on finger or style of writing and the screen during real option, computing machine can be handled suitable operation automatically.There is two-layer pressure sensitivity film this in fact electronic whiteboard inside, and when whiteboard surface a bit was under pressure, two membranes formed short circuit in this, and the controller of electronic whiteboard detects the coordinate figure of pressure spot, sends into computing machine through interface.Use the electronic whiteboard of laser technology, respectively there is a generating laser electronic whiteboard both sides, and after the startup, generating laser sends laser and strafes electronic whiteboard surface, and pen has the function of induction laser, and during operation, generating laser can scan the position of sensitization pen.Induction blank adopt one can launching electromagnetic wave pen, arranging the receiving coil film in the blank level with vertical both direction.When pen when the receiving coil film, the coil chamber of commerce senses the electromagnetic wave that pen is launched.Near more from pen, the electrodynamic type that coil film is sensed is high more.Noctovisor scan formula blank, receive and power valve constitutes the scanning grid of level and vertical direction by the infrared ray around gathering in the viewing area, form a plane of scanning motion net, when object blocks is lived in the grid certain to level and vertical scan line, just can determine X, Y coordinate by the level that is blocked and the infrared ray position of vertical direction, its shortcoming: no pressure sensitivity is reacted, is subjected to high light and effect of dust, blank pen not to support functions such as right mouse button, and is difficult to computer operation.Use the blank of ultrasonic technology, place two on the both sides of screen and press the ultrasonic probe, ultrasonic receiver that fixed range distributes, the pen that is used to locate is a ultrasonic transmitter, when pen moves screen surperficial, institute's ultrasonic waves transmitted is received device along screen surface and detects, by receiving can the convert pen and the distance of two receivers of hyperacoustic time.Induction dependence radio frequency (RF) principle, blank plate in-core sensor installation receives the set specific frequency signal realization location that time writer sends, its shortcoming: must use special pens.Resistance pressure-sensitive blank, use resistive film technology, realize the pressure sensitivity location by detection resistance value, its shortcoming: poor durability, to be afraid of to scratch, reaction velocity is slower, can't do overlarge area, and the blank pen is not supported functions such as right mouse button, and is difficult to computer operation.
Location that critical problem is the blank pen in the whiteboard system.The sensor that adopt the current production location mainly adopts piezoelectric type, electromagnetic type and infrared scan grid sensor, makes electronic whiteboard dispose and move difficulty, and the production flow process is complicated simultaneously, and price is comparatively expensive.
Summary of the invention:
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of interactive electric whiteboard system is provided, this system is made up of radio receiver 4, blank 5 and the electronic whiteboard pen 6 of image collecting device 2, projection arrangement 1, computing machine 3, USB interface; Image collecting device 2 all is connected with computing machine 3 with projection arrangement 1, computing machine 3 is connected with the radio receiver 4 of USB interface, the operation that the radio receiver 4 of USB interface is used to receive the wireless signal of electronic whiteboard pen 6 and this wireless signal is sent to computing machine 3 and control computer 3; On the electronic whiteboard pen 6 infrared launcher is set, the infrared light of infrared launcher emission is radiated on the blank 5 and forms infrared light spot, infrared light spot is gathered by image collecting device 2 after image pick-up card passes to computing machine 3, computing machine 3 calculates the relative position that electronic whiteboard pen 6 is projected in blank 5, utilize relative position to generate image then, projection arrangement 1 projects to blank 5 with picture material simultaneously; Realize keyboard and mouse function by electronic whiteboard pen 6.
Described image collecting device 2 is an infrared camera; Described projection arrangement 1 is a projector.
What the radio receiver 4 of described USB interface comprised 315MHZ wireless receiving circuit, PT2272 decoding circuit and met the USB1.1 standard is the HID class USB device circuit of core with the Mega8 single-chip microcomputer; The wireless signal that the 315MHZ wireless receiving circuit receives is sent to HID class USB device circuit after the decoding of PT2272 decoding circuit.。
Described electronic whiteboard pen 6 comprises interactive key circuit, 315MHZ radio transmitter, PT2262 coding circuit and the infrared emission circuit that contains page turning up and down and right mouse button function; The wireless signal that interactive key circuit sends is sent to the emission of infrared emission circuit behind PT2262 coding circuit coding.
Described infrared launcher is infrared laser transmitter or infrared LED.
A kind of using method of interactive electric whiteboard system:
(1) image collecting device 2 is connected with computing machine 3, on the electronic whiteboard pen 6 infrared launcher is set, infrared laser is radiated on the blank 5 and forms infrared light spot, and the image on infrared light spot and the blank 5 passes to computing machine 3 after being gathered by image collecting device 2, forms original image;
(2) computing machine 3 is connected with the radio receiver 4 of USB interface, and the radio receiver 4 of USB interface is used to receive the wireless signal of electronic whiteboard pen 6 and this wireless signal is sent to computing machine 3;
(3) projection arrangement 1 is connected with computing machine 3, and 3 pairs of described original images of computing machine and wireless signal are analyzed, and synthesize combination picture, and projection arrangement 1 projects to blank 5 with combination picture;
(4), realize the interactive function of electric whiteboard system by the position of control electronic whiteboard pen 6 on blank 5.
Infrared laser or infrared LED are installed on the blank pen, and the infrared light that sends is radiated at and forms infrared light spot on the screen.Common camera with infrared function is installed additional infrared filter, can photograph the image of the infrared light spot on the screen behind the filtration visible light.After handling and calculate by computing machine, image obtains the coordinate of pen on screen.Utilize the locating information of pen to realize corresponding operating and generate image then, utilize projector that picture material is projected on the electronic whiteboard screen, be used to realize mutual control computing machine according to user's request.Simultaneously install button additional on the blank pen, send to receiver module by wireless mode, receiver module passes to computer to push button signalling by USB interface and realizes operations such as page turning up and down, shortcut menu.
The design can realize the electronic whiteboard interactive function at lower cost, utilize the blank pen to replace mouse at the enterprising line operate of blank, can move Any Application, any operation that can edit file, note, preservation etc. utilizes keyboard and mouse to realize on computers.Do not need the screen of special-purpose belt sensor fully, project to metope, common projection screen etc. can be realized the blank operation.Easy for installation.
Description of drawings:
Fig. 1 is a system architecture synoptic diagram of the present invention;
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1, a kind of interactive electric whiteboard system, this system is made up of radio receiver 4, blank 5 and the electronic whiteboard pen 6 of image collecting device 2, projection arrangement 1, computing machine 3, USB interface; Image collecting device 2 all is connected with computing machine 3 with projection arrangement 1, computing machine 3 is connected with the radio receiver 4 of USB interface, the operation that the radio receiver 4 of USB interface is used to receive the wireless signal of electronic whiteboard pen 6 and this wireless signal is sent to computing machine 3 and control computer 3; On the electronic whiteboard pen 6 infrared launcher is set, the infrared light of infrared launcher emission is radiated on the blank 5 and forms infrared light spot, infrared light spot is gathered by image collecting device 2 after image pick-up card passes to computing machine 3, computing machine 3 calculates the relative position that electronic whiteboard pen 6 is projected in blank 5, utilize relative position to generate image then, projection arrangement 1 projects to blank 5 with picture material simultaneously; Realize keyboard and mouse function by electronic whiteboard pen 6.
Described image collecting device 2 is an infrared camera; Described projection arrangement 1 is a projector.
What the radio receiver 4 of described USB interface comprised 315MHZ wireless receiving circuit, PT2272 decoding circuit and met the USB1.1 standard is the HID class USB device circuit of core with the Mega8 single-chip microcomputer; The wireless signal that the 315MHZ wireless receiving circuit receives is sent to HID class USB device circuit after the decoding of PT2272 decoding circuit.。
Described electronic whiteboard pen 6 comprises interactive key circuit, 315MHZ radio transmitter, PT2262 coding circuit and the infrared emission circuit that contains page turning up and down and right mouse button function; The wireless signal that interactive key circuit sends is sent to the emission of infrared emission circuit behind PT2262 coding circuit coding.
Described infrared launcher is infrared laser transmitter or infrared LED.
A kind of using method of interactive electric whiteboard system:
(1) image collecting device 2 is connected with computing machine 3, on the electronic whiteboard pen 6 infrared launcher is set, infrared laser is radiated on the blank 5 and forms infrared light spot, and the image on infrared light spot and the blank 5 passes to computing machine 3 after being gathered by image collecting device 2, forms original image;
(2) computing machine 3 is connected with the radio receiver 4 of USB interface, and the radio receiver 4 of USB interface is used to receive the wireless signal of electronic whiteboard pen 6 and this wireless signal is sent to computing machine 3;
(3) projection arrangement 1 is connected with computing machine 3, and 3 pairs of described original images of computing machine and wireless signal are analyzed, and synthesize combination picture, and projection arrangement 1 projects to blank 5 with combination picture;
(4), realize the interactive function of electric whiteboard system by the position of control electronic whiteboard pen 6 on blank 5.
Infrared laser or infrared LED are installed on the blank pen, and the infrared light that sends is radiated at and forms infrared light spot on the screen.Common camera with infrared function is installed additional infrared filter, can photograph the image of the infrared light spot on the screen behind the filtration visible light.After handling and calculate by computing machine, image obtains the coordinate of pen on screen.Utilize the locating information of pen to realize corresponding operating and generate image then, utilize projector that picture material is projected on the electronic whiteboard screen, be used to realize mutual and control computing machine according to user's request.Simultaneously install button additional on the blank pen, send to receiver module by wireless mode, receiver module passes to computer to push button signalling by USB interface and realizes operations such as page turning up and down, shortcut menu.
The design can realize the electronic whiteboard interactive function at lower cost, utilize the blank pen to replace mouse at the enterprising line operate of blank, can move Any Application, any operation that can edit file, note, preservation etc. utilizes keyboard and mouse to realize on computers.Do not need the screen of special-purpose belt sensor fully, project to metope, common projection screen etc. can be realized the blank operation.Easy for installation.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (6)
1, a kind of interactive electric whiteboard system is characterized in that: this system is made up of radio receiver (4), blank (5) and the electronic whiteboard pen (6) of image collecting device (2), projection arrangement (1), computing machine (3), USB interface; Image collecting device (2) all is connected with computing machine (3) with projection arrangement (1), computing machine (3) is connected with the radio receiver (4) of USB interface, the operation that the radio receiver of USB interface (4) is used to receive the wireless signal of electronic whiteboard pen (6) and this wireless signal is sent to computing machine (3) and control computer (3); The electronic whiteboard pen is provided with infrared launcher on (6), the infrared light of infrared launcher emission is radiated at blank (5) and goes up the formation infrared light spot, infrared light spot is gathered after image pick-up card passes to computing machine (3) by image collecting device (2), computing machine (3) calculates the relative position that electronic whiteboard pen (6) is projected in blank (5), utilize relative position to generate image then, projection arrangement (1) projects to blank (5) with picture material simultaneously; Realize keyboard and mouse function by electronic whiteboard pen (6).
2, a kind of interactive electric whiteboard system according to claim 1 is characterized in that: described image collecting device (2) is an infrared camera; Described projection arrangement (1) is a projector.
3, a kind of interactive electric whiteboard system according to claim 1 is characterized in that: the radio receiver of described USB interface (4) is by 315MHZ wireless receiving circuit, PT2262 decoding circuit and what meet the USB1.1 standard is that the HID class USB control circuit of core is formed with the Mega8 single-chip microcomputer; The 315MHZ wireless receiving circuit receives the high-frequency signal of radio transmitter emission, then signal is passed to the PT2272 decoding circuit and decodes; The USB control circuit that with Mega8 is core is identified as standard HID equipment by computing machine (3), receive through the decoded data of PT2272 decoding circuit, and use QWERTY keyboard host-host protocol to transmit steering order to main frame according to this data, instruction is promptly carried out corresponding operation after by computing machine (3) identification.
4, a kind of interactive electric whiteboard system according to claim 1 is characterized in that: described electronic whiteboard pen (6) is made up of the interactive button, PT2262 coding circuit and the 315MHZ radio transmitter that contain page turning up and down and right mouse button function; Interactive button comprises infrared laser or infrared LED emission button, turnover key and right mouse button button up and down, after control circuit detects some button persons of being operated in the interactive button and presses, the corresponding data that button produces is encoded with regard to starting the PT2262 coding circuit; Data after 315MHZ high-frequency emission antenna 12 will be encoded are spatial emission towards periphery, receives for receiving circuit.
5, a kind of interactive electric whiteboard system according to claim 1 is characterized in that: described infrared launcher is infrared laser transmitter or infrared LED.
6, the using method of a kind of interactive electric whiteboard system according to claim 1 is characterized in that:
(1) image collecting device (2) is connected with computing machine (3), the electronic whiteboard pen is provided with infrared launcher on (6), infrared laser is radiated at blank (5) and goes up the formation infrared light spot, image on infrared light spot and the blank (5) passes to computing machine (3) after being gathered by image collecting device (2), forms original image;
(2) computing machine (3) is connected with the radio receiver (4) of USB interface, and the radio receiver of USB interface (4) is used to receive the wireless signal of electronic whiteboard pen (6) and this wireless signal is sent to computing machine (3);
(3) projection arrangement (1) is connected with computing machine (3), computing machine (3) is analyzed described original image and wireless signal, obtain the positional information and the button operation of blank pen, realize that with this positional information and button operation projection arrangement (1) projects to blank (5) with feedback image to after the control of computer program and utilizing computer program to generate feedback image then;
(4), realize the interactive function of electric whiteboard system by the position of control electronic whiteboard pen (6) on blank (5).
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| CN200910021965A CN101533316A (en) | 2009-04-10 | 2009-04-10 | Interactive electric whiteboard system and method for using same |
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| CN200910021965A CN101533316A (en) | 2009-04-10 | 2009-04-10 | Interactive electric whiteboard system and method for using same |
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| CN101907954A (en) * | 2010-07-02 | 2010-12-08 | 中国科学院深圳先进技术研究院 | Interactive projection system and interactive projection method |
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| CN110209242B (en) * | 2019-05-23 | 2022-01-11 | 广州视源电子科技股份有限公司 | Button function binding method, button function calling method, button function binding device, button function calling device and projection control equipment |
| CN115297310A (en) * | 2022-10-08 | 2022-11-04 | 合肥全色光显科技有限公司 | Full-color laser intelligent education screen system and processing method thereof |
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